Functionalization agents

It is thought that the SH of the glutathione-sulfhydryl group acts as the functional agent in the reductive cleavage of the sulfur. 

In a recent study, some authors proposed the employment of thiolated polymers obtained by the immobilization of thiol groups on well-established multifunctional polymers such as poly(acrylates) and chitosans as functional agents having mucoadhesive, penetration enhancement, and enzyme-inhibiting properties [94,95]. 

Vinylsilanes utilized as crosslinking agent for polymers and as functionalizing agents for silicones... 

Dietary minerals are necessary for maintenance of normal cellular metabolism and tissue function. These nutrients participate in a multitude of biochemical and physiological processes important for health. Because of their broad biochemical activity, many of these compounds are intentionally used as functional agents in a variety of foods. On the other hand, some cations may induce a diversity of undesirable effects that influence the nutritional quality of foods. 

Table 13 Functionalization of bromo poly( -butyl acrylate) (PBA-Br) using nucleophilic substitution in the presence two functional agents 2-mercaptoethanol and 5-amino-1-pentanol...

Functional agents Experimental conditions (moll [PBA-Br] [Functional agent] [DABCO] Functionality... 

To develop a radiopharmaceutical as a renal tubular function agent, the... 

Waste of polyesters and polyamides may have suffered from the hydrolytic depolymerization. Thus, it may be necessary to increase the molecular weight by solid-state polycondensation under high vacuum, or by reactive coupling using such di-functional agents as di-glycidyls. Prior to melt processing, the resins should be dried to less than 0.01 wt% of moisture, re-stabilized and (if compounded with immiscible polymers) compati-bilized. 

Matrix compounds in hair dyeing consist of surfactants, emulsifiers, preservatives, conditioning agents, and additives for pH control/adjustment. They are essentially noncolor additives that are functional agents in hair dyes see Table 6-4. Vincent et al. [35] describe a procedure for the extraction of matrix compounds from oxidation hair dyes to allow for the clean chromatographic separation of the hair dye compounds for analysis. 

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